Web overfeeding device for tentering and drying machines



Sept. 8, 1964 u sc 3,147,532

WEB OVERFEEDING DEVICE FOR TENTERING AND DRYING MACHINES Filed June 16, 1961 4 Sheets-Sheet 1 F 9 I W N/Z l r+ Buy- @M P 1964 H.'BuYsc|-l 3,147,532

WEB OVERFEEDING DEVICE FOR TENTERING AND DRYING MACHINES Filed June 16, 1961 4 Sheets-Sheet 2 Fig.2

/N vans/Q H. BUYSCH 3,147,532

WEB OVERFEEDING DEVICE FOR TENTERING AND DRYING MACHINES Sept. 8, 1964 4 Sheets-Sheet 3 Fig. 3

Filed June 16, 1961 2, klaff- 601C155 13V Sept. 8, 1964 HgBuYscH 3,147,532

WEB OVERFEEDING DEVICE FOR TENTERING AND DRYING MACHINES Filed June 16, 1961 4 Sheets-Sheet 4 Fig. 4-

United States Patent "ice WEB OVERFEEDING DEVICE FOR TENTEG Apparatuses are known for loosely introducing the material web into the needle chains of tensioning and drying machines for fabrics, in which a rubber conveyor roller rotating at a greater circumferential speed than the chain, carries a needle brush (see German Patent 562,281).

Creasing is to occur due to the fact that the web of material which is fed to the rubber conveyor roller with a higher speed than that of the needle chain, is introduced from a diagonal path of approach into the correspondingly smaller projecting portion of the needle chain.

It will be understood that sufficient creasing for large amounts of shrinking cannot there be achieved, nor can uniform creasing be achieved. The feeding conveyor roller with the brush must draw off the approaching web in tensioned condition, so that from time to time slippage of the roller in relation to the tightly stretched web may easily occur and irregular folds are then formed.

Other loose needling apparatuses are also known with rubber conveyor roller and needle brush disposed on the same axis, in which the conveyor roller and brush revolve at the speed of the chain. A loosely rotating counterroller may be disposed opposite the conveyor roller (see German Patent 644,128).

Here also, the degree of fold formation is determined by the excess length of the diagonal path of the feed of the web in relation to the projection of its reception in the tensioning chains.

Further, loose introduction apparatuses are known in which there is provided, behind a pair of transport rollers conveying the web of material from the introducing rollers to the needling station with a higher speed than the speed of the chain, a trough-like guide member on which the web is conveyed by a needling brush and pressed into the needles of the chain.

With such apparatuses, the conveyor roller and the counter-roller must cooperate with a relatively high compression effect so as to ensure conveyance of the web of material. This is often undesirable in case of sensitive materials. Also, the high compression effect may sometimes cause sizing agents to become squeezed out and result in non-uniform stripes in the treated web.

The invention avoids high compression effects. It starts out from apparatuses for loosely introducing the web of fabric into the tensioning chains of tensioning and drying machines for fabrics, using coaxially mounted rubber conveyor roller and needling brush.

Joint mounting on one axis results in a compact apparatus for loose needling requiring little space. In order to be able to reduce the compression effect so far as possible and still safeguard secure conveyance of the fabric web in the region of the loose introduction device, it is proposed in accordance with the invention to support the rubber conveyor roller for the creased introduction of the edges of the web into needle chains, driven with an adjustable outrun 'in relation to the chain, on two counter-rollers, one of which, disposed above the needle chain, extends over the width of the rubber conveyor roller and of the needling brush and the other,

3,147,532 Patented Sept. 8, 1964 which is disposed lower extending only over the width of the rubber conveyor roller, a trough-like guide member being provided between the two counter-rollers serving as a base and gliding surface for the lateral edges of the web.

The trough-like guide member avoids possible lifting of the fabric web off the conveyor roller and brush by adhering to the upper counter-roller, if the second com.- pression point should remain behind in relation to the first compression point due to possible slippage in the conveying effect. In order that the web be guided in the trough-like guide member in a stretched condition at all times, the needling brush is, in accordance with the invention driven with a higher speed in relation to the coaxially disposed rubber conveyor roller.

In accordance with the invention, the two counterrollers and the trough-like member are conviently mounted on a swinging bracket which, for introducing the fabric web into clamping chains, is adjustable to assume a posi t-ion in which the upper counter-roller is disposed vertically beneath the rubber conveyor roller. In this manner it is possible to achieve loose introduction into needle as well as clamping chains.

The coaxially mounted rubber conveyor roller and needling brush are adjustable by an adjusting screw into a position desirable at any time in relation to the counterroller and they are maintained therein against an adjustable spring action.

As is the case with all loose introduction apparatuses operating with trough-like guide members, the apparatus in accordance with the invention has the advantage that the excess resulting from the lead of the web in relation to the speed of the chain is conveyed in unchanged condition up to and directly into the fold-forming station, and is there continuously pressed into the needles of the tensioning chain while forming uniform folds.

The creasing device in accordance with the invention has the further advantage that, by mere readjustment of the bracket for the counter-rollers, it is suitable for use in loosely introducing the web of fabric into clamping chains.

An embodiment of the invention showing an apparatus for the loose introduction of the material web into tensioning chains of tensioning and drying machines for fabrics is illustrated in the drawings.

FIGS. 1 and 2 show the device in lateral view and in a partial section, and in front view along line IIII of FIG. 1 used for the loose introduction of the material web into needle chains, and

FIGS. 3 and 4 are the same representations for the loose introduction of the material web into clamping chains.

A rubber-sheathed conveyor roller 1 is arranged coaxially with a needling brush 2 disposed adjacent thereto. The rubber conveyor roller 1 is mounted on a shaft 3, the brush 2 on a hollow shaft 4 concentrically therewith. The shaft 3 is driven by a sprocket 5, the shaft 4 by a sprocket 6 having a somewhat smaller diameter.

The sprockets 5, 6 engage sprockets 7, 8 on a shaft 9, which is driven by a sprocket wheel 10 in dependence on the speed of introduction of the material web 11 in such a manner that the rubber conveyor roller 1 rotates at a circumferential speed corresponding to the speed of introduction of the material Web, while the needling brush 2 has a corresponding outrun by speed increase of the pair of sprockets 6, 8 in relation to the pair of sprockets 5, 7 of the conveyor roller 1.

The drive shafts 3, 4 of the conveyor roller 1 and of the needling brush 2 are disposed in a housing 12 which is horizontally partitioned in the longitudinal axis of the shafts 3, 4. This housing encloses the sprockets 7, 8 mounted on the shaft 9 and is swingable about the shaft 9 for adjusting the conveyor roller 1 and the needling brush 2 into operating position. The end position of the operational position of the conveyor roller 1 and the brush 2, selected for example in dependence on the thickness or the type of the material web, may be secured by an adjustment screw 13 supported on a projection 14 of a base 15, which is secured on the inlet frames 16 in which the tensioning chain 17 is guided which is constructed as a combined clamping and needling chain.

In the base 15, a bolt 18 is secured on which the housing 12 is slidingly guided with a lug 19. The lug 19 of the housing 12 is under the pressure of a spring 21 the tension of which may be regulated by tensioning a nut 21 sitting on the bolt 18. When a scam in the material web passes through, the spring 2i permits lifting of the housing 12 with the conveyor roller 1 and brush 2 supported therein. The base 15 mounted on the top of the inlet frames 16 carries the bearing of the shaft 9. The casing 12 is mounted on the shaft 9 (see FIG. 2).

At the lower side of the inlet frames 16 there is secured a suspensionbracket 22. In the latter, a plate 24 with a bolt 25 is adjustable as to height and if desired laterally, so that a bracket 26 swingably supported on the bolt 25 engages with rollers 27, 28 carried by the latter, the conveyor roller with a pressure which is uniform so far as possible. Of the counter-rollers 27, 28 of the rubber roller 1, the roller 27 reaches over the width of the conveyor roller 1 and brush 2, the other roller 28 on the other hand reaching only over the width of the conveyor roller 1. The counter roller 27 is located, during the loose introduction of the material web into needle chains, above the path of the chain, while the roller 28 which reaches only over the width of the conveyor roller 1, lies lower than the roller 27. Between the rollers 27, 28 there is disposed a guide trough 29 bent in accordance with the circumference of the conveyor roller and the brush.

The mode of operation of the apparatus is as follows:

The Web of material 11 is conveyed by the insertion rollers (not shown) at the inlet of the machine with a higher speed in relation to the chain speed of the creasing device, which lead corresponds to the intended amount of creasing. The rubber conveyor roller 1 is adjusted in relation to the counter-rollers 27, 28 to the pressure required for conveying the material web depending on the type or the thickness of the web. By supporting the conveyor roller on the two counter-rollers 27, 28, such pressure can be reduced to about one-half of the pressure required if only one counter-roller is present. The conveyor roller rotates at the speed of feed of the Web 11, while the needling brush 2 is driven with a certain amount of higher speed. Thereby the brush takes care of removal in stretched condition of the edge of the web which is not engaged by the conveyor roller 1 behind the squeezing station between the conveyor roller 1 and the first counterroller 27 and further conveyance to the needling station at the end of the guide trough 29, where the web is directly and constantly pinned into uniform folds by the brush in the needles of the tensioning chain 1'7, to the degree of its lead in relation to the chain.

The rubber conveyor roller 1 is cylindrical only in the region adjacent the brush 2 and which extends at most up to one-half of the length of the roller, while the remaining portion is slightly conically tapered. Thereby the material web is gripped only in the vicinity of the border. The conical portion, on the other hand, serves as a guide in order to insure, in cases where pieces are not sewn together border-on-border, or where a somewhat narrower piece is sewn to a Wider web, automatic entry of the sewn-011 piece into the creasing device by the lifting effect of the cone.

In the case of loose introduction into clamping chains in accordance with FIGS. 3 and 4, the swivel lever 26 carrying the counter-rollers 27, 28 is folded into a position in which the counter-roller 27 is disposed vertically underneath the rubber conveyor roller 1. The web 11 is pushed by the conveyor roller 1 and the roller 27 onto the clamping tables to the degree of the lead of conveyance. Since immediately after the squeezing station the clamp is closed, the material web, pushed at a greater speed than the chain onto the table of the next clamp, becomes choked up in longitudinal direction. In many cases this is enough for introducing a suflicient excess into the clamps for purposes of creasing. If a greater degree of creasing is intended, the web which is fed with a greater lead, may be introduced into suitably constructed clamps in undulating form, as for example in known clamps with transverse nuts in the clamping table, wherein the excess of the material web is pushed or introduced by friction by the brush 2 rotating with a lead, while forming folds.

While there has been herein described a preferred form of the invention, it should be understood that the same may be altered in details and in relative arrangement of parts within the scope of the appended claims.

Having now particularly described and ascertained the nature of the invention, and in what manner the same is to be performed, what is claimed is:

l. A web overfeeding device for tentering and drying machines of the type having a tenter chain with pins to impale and carry the edges of the web, said device comprising a friction faced conveyer wheel, a circular brush positioned alongside said wheel to engage the edges of the pins of the tenter chain, upper and lower counter rollers, the conveyer wheel engaging the web adjacent the edges of the web and upper and lower counter rollers, said rollers contacting the wheel under pressure, one being positioned above the chain and the lower roller being positioned below the upper roller, said wheel and circular brush having a common axis and said rollers being positioned on parallel axes to said common axis and said upper counter roller extending over the width of the conveyer wheel and circular brush and said lower counter roller extending only over the width of the conveyer roller and means to drive said circular brush at a higher speed than the conveyer wheel.

2. The device of claim 1, a trough-like guide member for guiding said web edges into contact with the circular brush so that the circular brush will engage the edges of the web with the pins of the tenter chain.

3. The device of claim 1, means including concentric shafts and different size sprockets to drive the circular brush at a speed higher than the rubber roller.

4. The device of claim 1, a swingable bracket carrying said counter rollers and adjustment means to adjust the pressure between counter rollers and the wheel when introducing the web onto the pins of the tenter chain.

5. The device of claim 1, an adjustment for the conveyer wheel and the circular brush including a spring and an adjustment screw to regulate said spring to adjust the position between the circular brush and the counter rollers.

6. The device of claim 1, in which the conveyer wheel is cylindrical on its outside face adjacent the circular brush and is conically tapered to a smaller diameter away from the brush.

7. In a tenter frame for handling textile webs and carrying the webs to and engaging them on needle tenter chains, a friction faced conveyer roller, a circular needling brush positioned in side by side relationship, said conveyer roller and brush having a common axis, concentric shafts driving said roller and brush, drive means acting on said shafts to drive said needling brush at a faster rate than the conveyer roller, said conveyer roller conveying the edge of the Web onto the needle tenter chains and said brush impaling the edge of the fabric onto the needle tcnter chain, upper and lower pressure counter rollers, the upper roller extending the full width of the conveyer roller and brush and the lower roller extending only the Width of the conveyor roller.

8. The frame of claim 7, said upper roller positioned above the tenter chain and a guide trough between said pressure rollers pressing against said circular brush and a swinging bracket carrying said upper and lower rollers and guide trough.

References Cited in the file of this patent UNITED STATES PATENTS Dungler Jan. 24, 1939 Nield July 1, 1952 FOREIGN PATENTS Germany Oct. 24, 1932 

7. IN A TENTER FRAME FOR HANDLING TEXTILE WEBS AND CARRYING THE WEBS TO AND ENGAGING THEM ON NEEDLE TENTER CHAINS, A FRICTION FACED CONVEYOR ROLLER, A CIRCULAR NEEDLING BRUSH POSITIONED IN SIDE BY SIDE RELATIONSHIP, SAID CONVEYER ROLLER AND BRUSH HAVING A COMMON AXIS, CONCENTRIC SHAFTS DRIVING SAID ROLLER AND BRUSH, DRIVE MEANS ACTING ON SAID SHAFTS TO DRIVE SAID NEEDLING BRUSH AT A FASTER RATE THAN THE CONVEYOR ROLLER, SAID CONVEYER ROLLER CONVEYING THE EDGE OF THE WEB ONTO THE NEEDLE TENTER CHAINS AND SAID BRUSH IMPALING THE EDGE OF THE FABRIC ONTO THE NEEDLE TENTER CHAIN, UPPER AND LOWER PRESSURE COUNTER ROLLERS, THE UPPER ROLLER EXTENDING THE FULL WIDTH OF THE CONVEYER ROLLER AND BRUSH AND THE LOWER ROLLER EXTENDING ONLY THE WIDTH OF THE CONVEYOR ROLLER. 